Finding the Fourth Proportional to 28,857, 39,825.72 and 16,930.38

Step by Step Solution

1. Step 1: Write the proportion equation
   28,857 : 39,825.72 = 16,930.38 : x
2. Step 2: Convert to fraction form
   28,857/39,825.72 = 16,930.38/x
3. Step 3: Cross multiply
   28,857x = 39,825.72 × 16,930.38
4. Step 4: Simplify right side
   28,857x = 674,264,573.37
5. Step 5: Solve for x
   x = 674,264,573.37/28,857
6. Step 6: Final answer
   x = 23,365.72